LCDInfo.com

Hi

I received 2 LCD with Dual KS0108 Controller. (128*64)

I have fallowed this schema

So far, I have data. LCDinfo and Liquid-MP3 are working correctly,

My problem is with the Backlight. It simply don't work.
I looked many time to my connection, but it just don't light up. I tried both LCD, and both have the same problem.

My LCD is from Wayton M.I.T. and look like this when it work


thanks for help

Well I found the problem.

On that type of LCD, the VCC and Ground on Pin 19 and20 are inverted (so VCC should be on pin 20, not 19 )

I recognize that LCD from E-Bay. Anything useful electronics on the rest of the PCB?

yes I got it from Ebay

on the PCB, you can get the 10k Pot for contrast (small & usefull)

Switchs are electronic, so if you can use it.. I need mecanic Switch for my project... There is also a bigger switch like you find on Computer for on/off
The rest is simple LED

You need to fallow the Schema if you want to hook it up, except you change de polarity of the Backlight AND put a 22Ohm Resistor isted of 1.5ohm (which is too low, anything from 5 to 25 is fine)